Probably my least favorite Amerikkkan brainworm flavor is saying the Founding Fathers were some arbiters of freedom. They were slave owners who didn't think anyone except rich white landowning men should be allowed to vote, what's so free about that? Except of course for the implicit admission that that's what they like.

It's also connected to the belief that every other historical figure has to be perfect except for the precious Founding Fathers. Marx or Castro did a bad thing once? They're bad forever, but being an actual slave owner can be brushed under the rug with the usual excuses.